Method of making valve casings



Oct. 29, 1929. JONES METHOD OF MAKING VALVE CASINGS nve'n T01, lloyd Jns' Patented ct. 29, 19:29

morn JONES, or rnnnronr, NEW YORK,

.ASSIGNOR TO THE COLUMBUS MACHINE COMPANY, OF COLUMBUS, OHIO, A CORPORATION F OHIO METHOD 0F MAKING VALVE CASINGS Application ined April 19,

The present invention is directed to an improved method for making valve casings.

The primary object of the invention is to produce a method whereby valve casings, particularly gate valve casings, can be produced by the extrusion method in order that the hubs thereof will be integral with the valve casing or body. l

A further object of the invention is to provide a valve casing which is extremely light -and strong and one which can be manufactured at a minimum cost. With these and other objects in view, as will appear as the description proceeds,V the invention consists in the novel features of construction, combinations of elements and arrangements of parts, and hereinafter to be fully described and pointed out in the appendedV claim..

ln the accompanying drawing:

used9 Figure 2 is a side view thereof, Figure 3 is a sectional view showing the billet in the die, the plungers being shown in their inoperative positions9 Figure el is a sectional viewa the plungeis in the positions assumed for extruding the billet, and.

Figure 5 is a side view of the completed casing or body.

Referring to the drawing l designates the general form of the billet after being subjected to a forging operation, said billet having the same general contour of the die 2. rhis die is of the sectional type so that the billet can be easily placed therein for shaping and is of suificient strength to withstand the pressure to which the billet is subjected. rlFhe billet in its initial or solid form simulates in general the contour of a gate valve casing and in order to extrude the billet to provide a hollow casing a pair of horizontally disposed diam'etrically opposed plungers 3 3 are employed and a vertically movable plunger e, said plungers being simultaneously movable to points as shown in Figure 4. These plungers may be reciprocated in any approved manner, but preferably by hydraulic presses (not shown). A

Figure l is a top plan view of the billet 1924. Serial No. 707,583.

As shown in Figure 3 the plungers 3 and 4 are in their inoperative positions and when simultaneously moved the plungers engage the billet l, treated to an extrusion heat and is subjected to the action of the plungers, whereupon the billet is extruded into the shell form as shown in Figure 4. The movenient of the plungers are sopregulated that they will reach their respective positions as shown in Figure?) simultaneously, thus positively extruding the metal into the vertical branch 5 and horizontal branches 6 of the die 2, thereby producing a valve casing wherein the hubs 7 and body 8 are integrally connected. After the billet has been extruded to the form as shown in Figure 4 the resultant shell is removed from the die 2 and the branch otherwise suitably manipulated to produce the respective flanges 8 and 9.

llt will be of course understood that the confronting or inner ends of thehubs 7 are of suflicient thickness to permit the same to be interiorly threaded for engaging the usual ring seats (not shown)v or to provide valve seats 7.

'lhe billet is preferably formed from metal valloy especially adapted for use in connection with an extrusion method, but it will be understood that metal used used and when subjected to the action of the plungers will produce a casing which will not only be light but positively non-porous and especially desirable for use for valves of this type.

After the billets have been formed into the general shape as shown in Figure 5 it some times occurs that lins, webs or other obstructions will remain in the casing at the juncture of its branches and it will be of course understood that these obstructions can be removed by a reamer or in any other suitable manner so that the interior of the completed valve will be unobstructed.

As is well known the gate used in connection with this type of casing is guided to its seats and in order to provide these casings with such guiding means the plunger i is provided with grooves l0 upon opposite sides in casting may be .l

making 5 and branches 6 are rolled or so as to produce guiding ribs 11 during the manufacture of the casings or body.

llhe light, porous valve casing produced by the extrusion or" the billet is what may be properly termed a Worked metal casing valve as distinguished from a' pierced casing.

What is claimed is:

rlhe method of forming a valve casing having integral hub members which. consist in introducing a metal billet into a die having a chamber open at one end and having openended lateral chambers communicating with the other end of the main chamber, subjecting the billet to the simultaneous action of ya plurality of plungers each introduced throughone of said openings While permitting o the unrestricted outward lioW of the metal between the plungers and the adjacent Wall of the die and thereafter -orming danges on the top of the casing and on the ends of the hub members produced in the extruslon operation whereby a relatively light, non-porous, Worked-metal -valve casing of homogeneous texture is produced.

lln testimony whereof ll affix my signa-eure LLUYD JONES.

iiyama@ 

